Abstract: A foldable add-on side protection device for automobiles or the like includes an elongate strip of impact-absorbing resilient material, and an elongate strip of backing material bonded to the resilient material. The resilient material is separated into a plurality of sections of various lengths without interrupting the strip of backing material, so that the backing material may act as a hinge to allow the side protection device to be wound spirally upon itself in a compact and surface abutting manner. Velcro-like hoop and loop pressure attachable material on the surface of the resilient material and the surface of the backing material at spaced locations is provided for detachably connecting adjacent portions of the side protection device together when in the wound-up condition. A number of lengths of magnetic strip material are bonded to the resilient material remote from the backing material, to allow the side protection device to be magnetically adhered to a metallic vehicle.